4 Band Acoustic Guitar Preamp Amplifier EQ 7545R Pickup Acoustic Guitar Amplifier Preamps EQ 7545R pick-up equalizer system with 4 bands can be easily fitted into your acoustic guitar and it is essential to electrify and amplify their sound.^Under the saddle pickup for acoustic guitar^4 bands plus volume control^Supplied with a battery box Low battery indicator^Connecting wire with 2.5mm plug included